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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020

Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020: 268 records at 68 stations, peak on 28 August 2020. Closed.

Data as of . Last revised (2026-10-17).

Key Facts

  • Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020 set or tied 268 station records at 68 stations.
  • It ran from 23 August 2020 to 18 September 2020 (27 days) and its peak day was 28 August 2020.
  • Status: closed.
  • Kunming set a daily record high maximum temperature of 30.2 C (86.4 F) on 28 August 2020.
  • The busiest day was 28 August 2020 with 22 records.
  • The oldest broken record in the ranked list had stood for 77 years.

Footprint

23 August to 18 September 2020
Footprint of Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020 The area covered by Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020 is outlined, with 13 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020 is outlined, with 13 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020: stations that set records in the event
StationTypeValueDate
KunmingRecord high maximum temperature30.2 C (86.4 F)2020-08-28
Chiang MaiRecord high maximum temperature36.6 C (97.9 F)2020-09-03
PhetchabunRecord high maximum temperature36.8 C (98.2 F)2020-08-25
ShantouRecord high maximum temperature36.8 C (98.2 F)2020-09-02
Prachin BuriRecord high minimum temperature27.2 C (81.0 F)2020-08-25
Mae SariangRecord high minimum temperature25.0 C (77.0 F)2020-09-16
Hua HinRecord high maximum temperature37.2 C (99.0 F)2020-09-17
UttaraditRecord high maximum temperature36.5 C (97.7 F)2020-09-02
DeqenRecord high maximum temperature23.5 C (74.3 F)2020-08-28
Phitsanulok/SaritRecord high maximum temperature36.2 C (97.2 F)2020-08-30
DongfangRecord high maximum temperature34.3 C (93.7 F)2020-09-18
XiamenRecord high maximum temperature36.5 C (97.7 F)2020-09-02
ChuxiongRecord high maximum temperature30.9 C (87.6 F)2020-08-28

Records per Day

Peak day 22
Records per day during Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020 Records set or tied each day from 23 August 2020 to 18 September 2020. The most in one day was 22 on 28 August 2020. 0 6 13 19 25 08-2308-2608-2909-0109-0409-0709-1009-1309-16
Records set or tied each day from 23 August 2020 to 18 September 2020. The most in one day was 22 on 28 August 2020.
Records per day during Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020
DateRecords
2020-08-233
2020-08-241
2020-08-2513
2020-08-2612
2020-08-2713
2020-08-2822
2020-08-2915
2020-08-3018
2020-08-319
2020-09-016
2020-09-0221
2020-09-0322
2020-09-0413
2020-09-0517
2020-09-069
2020-09-073
2020-09-084
2020-09-091
2020-09-108
2020-09-1114
2020-09-125
2020-09-135
2020-09-146
2020-09-153
2020-09-1614
2020-09-177
2020-09-184

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020 ranked by margin
Kunming, 08-282.7 C (4.9 F)
Chiang Mai, 09-032.2 C (4.0 F)
Phetchabun, 09-052.1 C (3.8 F)
Shantou, 09-022.0 C (3.6 F)
Chuxiong, 08-281.7 C (3.1 F)
Shantou, 09-041.3 C (2.3 F)
Prachin Buri, 08-251.2 C (2.2 F)
Hua Hin, 09-171.1 C (2.0 F)
Deqen, 08-281.1 C (2.0 F)
Phitsanulok/Sarit, 08-301.1 C (2.0 F)
Xiamen, 09-021.1 C (2.0 F)
Dongfang, 09-181.0 C (1.8 F)
Mae Sariang, 08-291.0 C (1.8 F)
Uttaradit, 09-020.8 C (1.4 F)
Phetchabun, 09-020.7 C (1.3 F)

Margin is how far the new value is beyond the record it replaced. Ties are not shown.

Margin Against Age of the Broken Record

Margin against age of the broken record in Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020 268 records plotted by how far they beat the old record (across) and how many years the old record had stood (up). Long standing records beaten by a wide margin sit in the top right. 0 20 40 60 80 0.00.81.52.33.0 Margin (C) Years the old record stood
268 records plotted by how far they beat the old record (across) and how many years the old record had stood (up). Long standing records beaten by a wide margin sit in the top right.
Margin against age of the broken record in Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020
Margin (C)Years the old record stood
2.767
2.271
2.064
0.161
0.747
1.252
2.150
0.569
1.162
1.362
0.869
1.167
1.061
0.177
1.157
0.659
1.164
1.057
0.766
1.748
2.042
0.764
0.564
0.748
0.763
0.467
1.158
0.956
0.432
0.336
1.448
1.548
1.448
1.255
0.364
0.857
1.452
0.364
0.167
0.364
0.362
0.951
0.264
0.162
0.456
0.162
1.048
0.744
0.847
0.643
0.457
0.551
0.748
0.451
0.252
0.157
0.355
0.841
0.344
0.155
0.158
0.839
1.228
0.252
0.824
0.247
0.348
2.511
0.153
1.128
0.148
0.410
0.29
0.641
0.738
0.930
0.38
0.437
0.70
0.832
0.541
1.132
0.433
0.930
0.339
0.342
0.828
0.439
0.833
0.32
0.532
0.18
2.35
0.434
0.933
1.517
0.928
1.717
0.632
0.922
0.437
0.732
0.824
0.142
0.433
1.216
0.534
0.139
0.430
0.344
0.528
0.430
0.726
0.533
0.629
0.134
0.139
0.12
0.919
0.132
0.232
0.823
0.728
1.216
0.528
1.212
0.516
0.815
1.27
0.718
0.525
0.230
0.230
0.132
0.124
0.421
0.622
1.07
0.330
0.821
0.617
0.814
0.325
0.425
0.617
1.311
0.225
1.17
0.614
0.129
0.411
0.422
0.811
0.522
0.711
0.64
0.411
0.222
0.317
0.222
0.230
0.419
0.230
0.815
0.136
0.514
0.71
0.311
0.97
0.911
0.122
0.222
0.319
0.94
0.85
0.513
0.122
0.63
0.122
0.413
0.611
0.512
0.122
0.120
0.222
0.511
0.38
0.217
0.117
0.219
0.413
0.511
0.58
0.316
0.211
0.63
0.119
0.315
0.115
0.114

Compared With Other Events

Station records per event
Station records in Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020 compared with similar events
Heat wave in United States and Mexico, 16 January to 14 February 20249,869 records
Heat wave in United States, 28 January to 24 February 20266,528 records
Heat wave in United States and Mexico, 24 May to 19 June 20205,047 records
Heat wave in United States and Mexico, 26 March to 17 April 20213,669 records
Heat wave in Germany and 49 other countries, 18 December 2021 to 15 January 20223,626 records
Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020 (this event)268 records

Every Record Set

20 of 268
Every record set or tied during Heat wave in Thailand and 3 other countries, 23 August to 18 September 2020, in date order
DateStationRecordValueMarginYears stoodSignificance
2020-08-25PhetchabunRecord high maximum temperature36.8 C (98.2 F)0.1 C (0.2 F)6135 of 100 (Notable)
2020-08-25Prachin BuriRecord high minimum temperature27.2 C (81.0 F)1.2 C (2.2 F)5234 of 100 (Routine)
2020-08-28KunmingRecord high maximum temperature30.2 C (86.4 F)2.7 C (4.9 F)6739 of 100 (Notable)
2020-08-28DeqenRecord high maximum temperature23.5 C (74.3 F)1.1 C (2.0 F)6730 of 100 (Routine)
2020-08-28ChuxiongRecord high maximum temperature30.9 C (87.6 F)1.7 C (3.1 F)4828 of 100 (Routine)
2020-08-29Mae SariangRecord high maximum temperature35.5 C (95.9 F)1.0 C (1.8 F)5729 of 100 (Routine)
2020-08-30Phitsanulok/SaritRecord high maximum temperature36.2 C (97.2 F)1.1 C (2.0 F)5730 of 100 (Routine)
2020-08-30Prachin BuriRecord high minimum temperature26.9 C (80.4 F)0.6 C (1.1 F)5930 of 100 (Routine)
2020-09-02ShantouRecord high maximum temperature36.8 C (98.2 F)2.0 C (3.6 F)6435 of 100 (Notable)
2020-09-02PhetchabunRecord high maximum temperature37.0 C (98.6 F)0.7 C (1.3 F)4734 of 100 (Routine)
2020-09-02UttaraditRecord high maximum temperature36.5 C (97.7 F)0.8 C (1.4 F)6931 of 100 (Routine)
2020-09-02Chiang MaiRecord high maximum temperature35.1 C (95.2 F)0.1 C (0.2 F)7730 of 100 (Routine)
2020-09-02XiamenRecord high maximum temperature36.5 C (97.7 F)1.1 C (2.0 F)6429 of 100 (Routine)
2020-09-03Chiang MaiRecord high maximum temperature36.6 C (97.9 F)2.2 C (4.0 F)7139 of 100 (Notable)
2020-09-03UttaraditRecord high maximum temperature36.5 C (97.7 F)0.7 C (1.3 F)6629 of 100 (Routine)
2020-09-04ShantouRecord high maximum temperature36.3 C (97.3 F)1.3 C (2.3 F)6231 of 100 (Routine)
2020-09-05PhetchabunRecord high maximum temperature36.5 C (97.7 F)2.1 C (3.8 F)5033 of 100 (Routine)
2020-09-16Mae SariangRecord high minimum temperature25.0 C (77.0 F)0.5 C (0.9 F)6932 of 100 (Routine)
2020-09-17Hua HinRecord high maximum temperature37.2 C (99.0 F)1.1 C (2.0 F)6232 of 100 (Routine)
2020-09-18DongfangRecord high maximum temperature34.3 C (93.7 F)1.0 C (1.8 F)6130 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 268 records the event counts. The counts above use the full total.

Download the Data

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.